Question

find the equivalent resistance across the two ends A and B of the circuits a torch bulb is rated 5 v and 500 milliampere calculate its power and its resistance and the energy consumed is this bulb is lighted for 4 hours​

Answer 1

V = 5v

I = 500 mA = 0.5A

Power = vi

= 5 * 0.5

= 2.5 W

Resistance, R = V^2/W

= 5 * 5 / 2.5

= 10 Ohm